Police say he has been arrested on suspicion of possession of a class B controlled drug, possession of a class B controlled drug with intent to supply and being concerned in the supply of a class B controlled drug.
Detective Inspector Tom McClure said: “The searches are part of a proactive investigation into the supply of illegal drugs in the North Coast area and as part of the overall search operation, four suspicious packages were recovered.
“These packages are believed to contain herbal cannabis and cannabis resin with an estimated street value of approximately £3900.
“A quantity of cash, some mobile phones and some other items were also seized in the searches.
“We are determined to crack down on individuals involved in the illegal supply of drugs and I would like to thank the local community for their continued support.
“Anyone with any information about the illegal use of drugs in their area should contact their local police station on the non emergency number 101.
“Or if someone would prefer to provide information without giving their details, they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.”
The 31 year old man currently remains in custody assisting police with their enquiries.